| /* |
| * Copyright 2012 Freescale Semiconductor, Inc. |
| * |
| * The code contained herein is licensed under the GNU General Public |
| * License. You may obtain a copy of the GNU General Public License |
| * Version 2 or later at the following locations: |
| * |
| * http://www.opensource.org/licenses/gpl-license.html |
| * http://www.gnu.org/copyleft/gpl.html |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/io.h> |
| #include <linux/jiffies.h> |
| #include <linux/spinlock.h> |
| #include "clk.h" |
| |
| DEFINE_SPINLOCK(mxs_lock); |
| |
| int mxs_clk_wait(void __iomem *reg, u8 shift) |
| { |
| unsigned long timeout = jiffies + msecs_to_jiffies(10); |
| |
| while (readl_relaxed(reg) & (1 << shift)) |
| if (time_after(jiffies, timeout)) |
| return -ETIMEDOUT; |
| |
| return 0; |
| } |